MPI_Recv_init - Online Linux Manual PageSection : 3
Updated : Jan 21, 2016
Source : 1.10.2
Note : Open MPI

NAMEMPI_Recv_init − Builds a handle for a receive.

SYNTAX

C Syntax#include <mpi.h> int MPI_Recv_init(void *buf, int count, MPI_Datatype datatype, int source, int tag, MPI_Comm comm, MPI_Request *request)

Fortran SyntaxINCLUDE 'mpif.h' MPI_RECV_INIT(BUF, COUNT, DATATYPE, SOURCE, TAG, COMM, REQUEST, IERROR) <type> BUF(*) INTEGER COUNT, DATATYPE, SOURCE, TAG, COMM, REQUEST, IERROR

C++ Syntax#include <mpi.h> Prequest Comm::Recv_init(void* buf, int count, const Datatype& datatype, int source, int tag) const

INPUT PARAMETERScount  Maximum number of elements to receive (integer). datatype  Type of each entry (handle). source  Rank of source (integer). tag  Message tag (integer). comm  Communicator (handle).

INPUT/OUTPUT PARAMETERbuf  Initial address of receive buffer (choice).

OUTPUT PARAMETERSrequest  Communication request (handle). IERROR  Fortran only: Error status (integer).

DESCRIPTIONCreates a persistent communication request for a receive operation. The argument buf is marked as OUT because the user gives permission to write on the receive buffer by passing the argument to MPI_Recv_init. A persistent communication request is inactive after it is created -- no active communication is attached to the request. A communication (send or receive) that uses a persistent request is initiated by the function MPI_Start or MPI_Startall.

ERRORSAlmost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI::Exception object. Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.

SEE ALSOMPI_Bsend_init
MPI_Rsend_init
MPI_Send_init
MPI_Sssend_init
MPI_Start
MPI_Startall
MPI_Request_free
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